155 lines
4.3 KiB
Plaintext
155 lines
4.3 KiB
Plaintext
================================================================================
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MIGRATION PLAN: 21031930da18
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================================================================================
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Source System: Legacy User Service (Java Spring Boot 2.x)
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Target System: New User Service (Node.js + TypeScript)
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Migration Type: SERVICE
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Complexity Level: CRITICAL
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Estimated Duration: 500 hours (20.8 days)
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Created: 2026-02-16T13:47:34.565896
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MIGRATION PHASES
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----------------------------------------
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1. INTERCEPT (100h)
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Description: Execute intercept phase
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Risk Level: MEDIUM
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Tasks:
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• Complete intercept activities
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Success Criteria:
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✓ Intercept phase completed successfully
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2. IMPLEMENT (100h)
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Description: Execute implement phase
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Risk Level: MEDIUM
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Dependencies: intercept
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Tasks:
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• Complete implement activities
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Success Criteria:
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✓ Implement phase completed successfully
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3. REDIRECT (100h)
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Description: Execute redirect phase
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Risk Level: MEDIUM
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Dependencies: implement
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Tasks:
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• Complete redirect activities
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Success Criteria:
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✓ Redirect phase completed successfully
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4. VALIDATE (100h)
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Description: Execute validate phase
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Risk Level: MEDIUM
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Dependencies: redirect
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Tasks:
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• Complete validate activities
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Success Criteria:
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✓ Validate phase completed successfully
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5. RETIRE (100h)
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Description: Execute retire phase
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Risk Level: MEDIUM
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Dependencies: validate
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Tasks:
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• Complete retire activities
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Success Criteria:
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✓ Retire phase completed successfully
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RISK ASSESSMENT
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----------------------------------------
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HIGH SEVERITY RISKS:
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• Service compatibility issues
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Category: technical
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Probability: medium | Impact: high
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Mitigation: Implement comprehensive integration testing
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Owner: Development Team
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• Feature parity gaps
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Category: business
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Probability: high | Impact: high
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Mitigation: Document feature mapping and acceptance criteria
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Owner: Product Owner
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• Zero-downtime requirement increases complexity
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Category: business
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Probability: high | Impact: medium
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Mitigation: Implement blue-green deployment or rolling update strategy
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Owner: DevOps Team
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• Regulatory compliance requirements
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Category: compliance
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Probability: medium | Impact: high
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Mitigation: Ensure all compliance checks are integrated into migration process
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Owner: Compliance Team
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MEDIUM SEVERITY RISKS:
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• Performance degradation
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Category: technical
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Probability: medium | Impact: medium
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Mitigation: Conduct load testing and performance benchmarking
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Owner: DevOps Team
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• Monitoring gap during transition
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Category: operational
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Probability: medium | Impact: medium
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Mitigation: Set up dual monitoring and alerting systems
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Owner: SRE Team
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ROLLBACK STRATEGY
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----------------------------------------
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Rollback Triggers:
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• Critical system failure
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• Data corruption detected
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• Migration timeline exceeded by > 50%
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• Business-critical functionality unavailable
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• Security breach detected
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• Stakeholder decision to abort
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Rollback Phases:
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RETIRE:
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- Revert retire changes
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- Restore pre-retire state
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- Validate retire rollback success
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Estimated Time: 1500 minutes
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VALIDATE:
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- Revert validate changes
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- Restore pre-validate state
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- Validate validate rollback success
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Estimated Time: 1500 minutes
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REDIRECT:
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- Revert redirect changes
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- Restore pre-redirect state
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- Validate redirect rollback success
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Estimated Time: 1500 minutes
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IMPLEMENT:
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- Revert implement changes
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- Restore pre-implement state
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- Validate implement rollback success
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Estimated Time: 1500 minutes
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INTERCEPT:
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- Revert intercept changes
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- Restore pre-intercept state
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- Validate intercept rollback success
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Estimated Time: 1500 minutes
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SUCCESS CRITERIA
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----------------------------------------
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✓ All data successfully migrated with 100% integrity
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✓ System performance meets or exceeds baseline
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✓ All business processes functioning normally
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✓ No critical security vulnerabilities introduced
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✓ Stakeholder acceptance criteria met
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✓ Documentation and runbooks updated
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STAKEHOLDERS
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----------------------------------------
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• Business Owner
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• Technical Lead
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• DevOps Team
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• QA Team
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• Security Team
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• End Users
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